Coreless scoop for separable fastener stringers



Dec. 13, 1949 MoRlN 2,491,197

.CORELESS SCOOP FOR SEPARABLE FASTENER STRINGERS Filed Aug. 15, 1944 INVENTOR [00/5 Mae/N ATTOREEY Patented Dec. 13, 1949 CORELESS SCOOP FOR SEPABABLE FASTENEB STBINGEBS Louis 11. Morin, Bronx, N. Y.

Application August 15, 1944, Serial No. 549,571

6 Claims. (01. 24205.l3)

This invention relates to separable fastener stringers employing scoops arranged along the edges of the stringers to couple and uncouple the same. More particularly, the invention relates to scoop structures of the coreless type being of v-shaped cross sectional form, and further, of the chevron type, by reason of the angular mounting end portions on the scoop, and still further of the double action type by virtue of having upper and lower similar coupling surfaces adapting the scoops of companion stringers for coupling and uncoupling by sliders arranged and operated on the stringers in any desired manner. The novel features of.the invention will be best understood from the following descriptions when taken together with the accompanying drawing, in which certain embodiments of the invention are disclosed, and in which the separate parts are designailed by suitable reference characters in each of the views; and in which:

Fig. 1 is a side and sectional view of portions of two stringers with the scoops thereof in coupled relationship and with parts of the construction broken away.

Fig. 2 is a partial section on the line 2-2 of Fig. 1, showing only the structure of the scoops at the section line and omitting all background illustrations.

Fig. 3 is a perspective view of one of the scoops shown in Figs. 1 and 2 detached with respect to its supporting tape.

Fig. 4 is a view similar to Fig. 3 showing a modifled form of scoop; and

Fig. 5 is a plan view of a scoop generally similar to the scoop shown in Figs. 1 to 3 and showing a slight modification.

In Fig. 1 of the drawing, I have shown at It and H portions of two stringer tapes upon the beaded edges 12 and I3 of which are arranged a plurality of similar scoops l4 and I4. As the scoops l4 arranged on the stringer ID are identical with the scoops l4 arranged on the stringer H, the brief description of one of these scoops, for example, the scoop l4 shown in Fig. 3 of the drawing will be applicable to all. Each scoop has a mounting end portion l5 and a coupling end portion IS. The scoop body is of V-shaped cross sectional form throughout the length thereof. This V-shaped cross sectional contour defines a groove or channel I! longitudinally of the central portion of one surface of the scoop, and a corresponding ridge or projection 18 centrally and longitudinally of the other surface thereof, as

The coupling end has what may be termed a diamond head I! defined by corresponding upper and lower projecting members or projections 20 and 2! and these projections converge from the central portion of the scoops to side surfaces thereof, as indicated by the converging lines 22 at the outer end of the head i9, thus the cross sectional area of the coupling head is at side surfaces of the scoop is less than the cross sectional area of the coupling head centrally of the scoop. This construction provides between coupled scoops clearance spaces 23, note Figs. 1 and 2, to permit flexing or bending of the coupled stringers within the limits defined by the clearances as at 23. The transverse projections 20 and 21 may also be defined as male coupling portions, and as can be seen, they-are in perpendicular alinement with respect to each other. That is to say, the upper and lower projections of the right hand longitudinal half, or side portion, of the scoop (Fig. 3) lie in the same perpendicular plane, and the upper and lower projections of the left half or side portion also lie in the same perpendicular plane.

The inwardly converging walls 24 which partially define the head I9, form one wall portion of upper and lower coupling grooves or alined recesses 25 and 26 for the reception of the coupling heads of a companion stringer, as will clearly appear in Fig. 1 of the drawing. The upper and lower grooves 25 and 26 may also be defined as will clearly appear from a consideration of Fig. 2 6B of the drawing.

female coupling portions and are perpendicularly alined with respect to each other in the same manner as the male coupling portions, as described above.

The groove 26 is also defined by an angularly extending wall 21; whereas the groove 25 is defined by an angularly extending wall 28 which continues onto the mounting end portion l5 and defines the angularity of the mounting end portion on the stringer tape or the beaded edge thereof in producing the herringbone or chevron type of fastener. Opposite the wall 28 is a wall 29 formed on the lower surface of the mounting end portion [5. It will be understood that the walls 28 and 29 also converge outwardly in the direction of the side surfaces of the scoop body in a manner similar to the converging of the Walls of the head I 9. The purpose of this construction is to provide free ejection or discharge of the scoop bodies from cavities of relatively movable dies, particularly in forming the scoop bodies as die castings.

The aperture 30 in the mounting end portion I5 is for the reception of the stringer tape includ- 3 ing the beaded edge thereof. In some instances, the casting may be formed directly upon the stringer tape and thus become securely fixed thereto. The omission of the tape in Fig. 3 is simply for clarity in the illustration.

In Fig. 4 of the drawing is shown a modified form of scoop 3|. At 32 is the mounting end portion of the scoop, and 33 .the coupling end portion thereof. The scoop II differs fromthe scoop ll simply in the angular relationship of the parts. In other words, the head 34 is inverted as compared with the head is. The recessed surface II B directed downwardly and the ridged surface It is directed upwardly, otherwise, the cross sectional form of the head will be the same as that shown in Figshl to 3 inclusive, and from this .posed surfaces of the scoops being contracted standpoint, will require no further specific description. It will also be apparent that the mounting end portion 32 may be said to extend angularly in the direction of'the ridged surface It rather than in the direction of the grooved surface II, as in Figs. 1 to 3 inclusive, otherwise the structure of the mounting end portion 32 is the same as that shown in Figs. 1 to 3 inclusive.

In Fig. 5 of the drawing I have shown at 31 a scoop identical with the scoop shown in Figs. 1 to 3 inclusive, excepting that side surfaces of the scoops are recessed or notched as at 38 in alinement with the transverse coupling groove 39 of the scoop similar to the groove 25 and disposed inwardly of the head 40 which is otherwise similar to the head IS. In Fig. 5, the longitudinal line ll represents the recess surface similar to the recess l1, and naturally the opposed surfaces would have a ridge similar to the ridge it.

In the several forms of scoop structure, it will be apparent that the angularity of the mounting end portion of the scoops, in addition to producing the chevron or herringbone effect on resulting coupled stringers, also results in a materlally stronger scoop mounting. Ordinarily, the scoops extend at right angles to the tape edge and grip the tape over an area limited by the thickness of the mounting end, whereas by disposing the mounting end at the angle, the result is to obtain a contact and gripping area equivalent to that of a much thicker mounting end portion. That is to say, by extending the mounting end portion angularly onto the tape, such portion extends over a length of tape edge materially greater than the thickness of the portion.

Considering the scoop structures, it will be apparent that one surface of the scoop has intersecting channels. Fig. 3, the longitudinal channel or groove I1 is intersected by the transverse channel or groove 25, whereas the opposed surface has the longitudinal ridge l8 intercepted by the transverse channel or groove 25, the latter being in alinement with the channel 25 on the first surface of the scoop. It will also be apparent that the coupling end portion which is of V-shaped cross sectional form may be said to be disposed perpendicularly to thetape edge, whereas the mounting end portion of the scoop, also V-shaped in cross sectional form is disposed angularly with respect to the tape edge, meaning other than at right angles thereto. So far as the Fig. 1 showing is concerned, the mounting end portion may properly be described as extending angularly upwardly with respect to the tape edge.

Having fully described my invention, what I claim as new and desire to secure by Letters Paten is:

That is to say, considering from thecenter thereof to side surfaces of the scoops to provide clearance between coupled scoops for fiexure of the stringers, and the side surfaces of the inner end portions of the scoops having notches providing additional fiexure of coupled stringers.

2. A scoop of the class described, comprising a body having a coupling end portion and a mounting end portion, the coupling end portion having a channel extending throughout the full length of one side surface of the body and an alined ridgeextending the full length of the opposed side surface of said body and substantially complementing the contour of said channel, both of said surfaces having oppositely arranged and alined transverse recesses and projecting members, said channel and alined ridge dividing the scoop intotwo longitudinal halves each inclined towards the other, each said half being of a cross section that is continuously tapered in the direction of the side edge of the half, and the mounting end portion of the scoop body extending angularly with respect to the coupling end portion.

3. A scoop of the class described, comprising a body having a coupling end portion and a mounting end portion, the coupling end portion.

having a channel extending throughout the full length of one side surface of the body and an alined ridge extending the full length of the opposed side surface of said body and substantially complementing the contour of said channel, both of said surfaces having oppositely arranged and alined transverse recesses and pro- Jecting members, said channel and alined ridge dividing the scoop into two longitudinal halves each inclined towards the other, the entire side surfaces of each said half continuously converging in the direction of the side edge of the with the second mentioned channel of the first side surface of said scoop, said scoop having a notch in each side edge thereof at the point through which said alined channels open, and sav d scoop having a mounting end portion extending angularly to the coupling end portion.

5. A scoop for separable fastener stringers, said scoop having a coupling end portion, the coupling end portion of the scoop having on one side surface thereof intersecting channels, onech'annel 1.. In stringers of separable fasteners having 7 Extending lonfltudinally f n Opening hr h the ends of the scoop and the other channel opening through side edges thereof, the other side surface of said coupling end portion of the scoop having a longitudinal ridge alined with said longitudinal channel, a channel intersecting the ridge and in alinement with the second mentioned channel of the first side surface of said scoop, said scoop having a cross section which is thickest at the place bounded by said alined longitudinal channel and longitudinal ridge and which tapers continuously towards each side edge thereof, said scoop having a mounting end portion extending angularly to the coupling end portion.

6. In separable fastener stringers employing a pair of spaced tapes having scoops spaced longitudinally of one edge of each tape, each scoop comprising a body having a coupling end portion and a mounting end portion, a channel extending throughout the full length of one surface of the body and a complementary ridge extending the full length of the opposed surface of said body, each said scoop having a V-shaped cross section by virtue of said channel and ridge and the V-shaped cross sectional form of the scoops serving to retain coupled stringers. against transverse REFERENCES CITED The following references are of record in the flle of this patent:

UNITED STATES PATENTS Number Name Date 2,158,079 Miller May 16, 1939 2,330,001 Morin Sept. 21, 1943 2,331,618 Morin Oct. 12, 1943 FOREIGN PATENTS Number Country Date 442,809 Great Britain Feb. 17, 1938 

